A fine structure in the C-14 decay of Ac-225 is predicted quantitatively by
accounting dynamical aspects during the disintegration process. Transition
s to the excited states of the daughter nucleus are considered to be mainly
directed by the Landau-Zener promotion mechanism in the region of avoided
crossing levels, The level scheme is evaluated with the superasymmetric two
-center shell model. The half-lives are computed considering the cluster de
cay as a superasymmetric fission process.